Two other useful functions are any and all. The any function takes a vector of logicals and returns TRUE if any of the entries is TRUE. The all function takes a vector of logicals and returns TRUE if all of the entries are TRUE. Here is an example:
z <- c(TRUE, TRUE, FALSE)
any(z)
#> [1] TRUE
all(z)
#> [1] FALSE
vec <- c(1:5, NA, 6:11, NA, 21, NA, 3:5)
vec_noNA <- ifelse(is.na(vec), 0, vec)
vec <- vec_noNA
rm(vec_noNA)
# Check the pre-defined variable 'vec'.
head(vec)
# Check whether there is a value larger than 10.
any(vec > __)
# Check whether all values are larger than 10.
all(vec > __)
# Create a code to check whether there exists a value larger than 10.
if(________){
print("There exists a value larger than 10")
}
# Check the pre-defined variable 'vec'.
head(vec)
# Check whether there is a value larger than 10.
any(vec > 10)
# Check whether all values are larger than 10.
all(vec > 10)
# Create a code to check whether there exists a value larger than 10.
if(any(vec > 10)){
print("There exists a value larger than 10")
}
msg <- "Please see that objects are well-defined and correct."
test_function(any)
test_function(all)
success_msg("Great! Head over to the next exercise.")